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authorChangbin Du <changbin.du@gmail.com>2020-08-08 10:31:31 +0800
committerArnaldo Carvalho de Melo <acme@redhat.com>2020-08-14 09:16:43 -0300
commitb1d84af6f58022a0d75f5745367624549cd0bfbf (patch)
tree1e3f8bfc3b1794de14fb590f2b796d5241ce1023 /tools/perf/Documentation
parenta80abe2a9a8a420b4dd88713ba0ad3c163e7a79b (diff)
perf ftrace: Add support for tracing option 'func_stack_trace'
This adds support to display call trace for function tracer. To do this, just specify a '--func-opts call-graph' option. Example: $ sudo perf ftrace -T vfs_read --func-opts call-graph iio-sensor-prox-855 [003] 6168.369657: vfs_read <-ksys_read iio-sensor-prox-855 [003] 6168.369677: <stack trace> => vfs_read => ksys_read => __x64_sys_read => do_syscall_64 => entry_SYSCALL_64_after_hwframe ... Signed-off-by: Changbin Du <changbin.du@gmail.com> Acked-by: Namhyung Kim <namhyung@kernel.org> Tested-by: Arnaldo Carvalho de Melo <acme@redhat.com> Cc: Jiri Olsa <jolsa@redhat.com> Cc: Peter Zijlstra <peterz@infradead.org> Cc: Steven Rostedt (VMware) <rostedt@goodmis.org> Link: http://lore.kernel.org/lkml/20200808023141.14227-9-changbin.du@gmail.com Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
Diffstat (limited to 'tools/perf/Documentation')
-rw-r--r--tools/perf/Documentation/perf-ftrace.txt4
1 files changed, 4 insertions, 0 deletions
diff --git a/tools/perf/Documentation/perf-ftrace.txt b/tools/perf/Documentation/perf-ftrace.txt
index c46d0a09b38c..8f08ad0992c2 100644
--- a/tools/perf/Documentation/perf-ftrace.txt
+++ b/tools/perf/Documentation/perf-ftrace.txt
@@ -76,6 +76,10 @@ OPTIONS
specify multiple functions (or glob patterns). It will be
passed to 'set_ftrace_notrace' in tracefs.
+--func-opts::
+ List of options allowed to set:
+ call-graph - Display kernel stack trace for function tracer.
+
-G::
--graph-funcs=::
Select function_graph tracer and set graph filter on the given